STUDY THE FRICTIONAL PRESSURE DROP IN FLUDIZED BED

Chemical Engineering

A fluidized bed is a packed bed through which fluid flows at such a high velocity that the bed is loosened and the particle-fluid mixture behaves as though it is a fluid. There have been widespread applications of fluidized beds in industries which are related to the combination of liquid-solid particles during the last decade. High capacity of fluidized bed in heat and mass transfer has made this device very popular. So in order to decrease Pressure drop, we can change various parameters like diameter of the column, length of the column (L), fluidizing medium, packing used, void fraction (). In our experiment, the use lab scale fluidized bed as modeled using glass as the solid packing and liquid as the high velocity fluid. Types of packing materials were used to effect the range of Reynolds number and subsequent pressure drop. From experiments it is found that there is a significant relationship between pressure, frictional factor and Reynolds number with respect to flow rate and pressure so we perform this experiment by changing above parameters and packing to decrease the pressure drop and pumping cost there by optimize the operating cost. The calculated pressure drop across a packed bed is compared with theoretical values calculated by Ergun’s equation.

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